2 * net/tipc/msg.h: Include file for TIPC message header routines
4 * Copyright (c) 2000-2007, 2014-2017 Ericsson AB
5 * Copyright (c) 2005-2008, 2010-2011, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
40 #include <linux/tipc.h>
44 * Constants and routines used to read and write TIPC payload message headers
46 * Note: Some items are also used with TIPC internal message headers
48 #define TIPC_VERSION 2
52 * Payload message users are defined in TIPC's public API:
53 * - TIPC_LOW_IMPORTANCE
54 * - TIPC_MEDIUM_IMPORTANCE
55 * - TIPC_HIGH_IMPORTANCE
56 * - TIPC_CRITICAL_IMPORTANCE
58 #define TIPC_SYSTEM_IMPORTANCE 4
62 * Payload message types
64 #define TIPC_CONN_MSG 0
65 #define TIPC_MCAST_MSG 1
66 #define TIPC_NAMED_MSG 2
67 #define TIPC_DIRECT_MSG 3
68 #define TIPC_GRP_MEMBER_EVT 4
69 #define TIPC_GRP_BCAST_MSG 5
70 #define TIPC_GRP_MCAST_MSG 6
71 #define TIPC_GRP_UCAST_MSG 7
74 * Internal message users
76 #define BCAST_PROTOCOL 5
78 #define LINK_PROTOCOL 7
79 #define CONN_MANAGER 8
80 #define GROUP_PROTOCOL 9
81 #define TUNNEL_PROTOCOL 10
82 #define NAME_DISTRIBUTOR 11
83 #define MSG_FRAGMENTER 12
84 #define LINK_CONFIG 13
86 #define SOCK_WAKEUP 14 /* pseudo user */
87 #define TOP_SRV 15 /* pseudo user */
90 * Message header sizes
92 #define SHORT_H_SIZE 24 /* In-cluster basic payload message */
93 #define BASIC_H_SIZE 32 /* Basic payload message */
94 #define NAMED_H_SIZE 40 /* Named payload message */
95 #define MCAST_H_SIZE 44 /* Multicast payload message */
96 #define GROUP_H_SIZE 44 /* Group payload message */
97 #define INT_H_SIZE 40 /* Internal messages */
98 #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
99 #define MAX_H_SIZE 60 /* Largest possible TIPC header size */
101 #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
102 #define TIPC_MEDIA_INFO_OFFSET 5
104 extern const int one_page_mtu;
109 struct sk_buff *tail;
110 unsigned long nxt_retr;
111 unsigned long retr_stamp;
118 #ifdef CONFIG_TIPC_CRYPTO
120 struct tipc_crypto *rx;
121 struct tipc_aead *last;
123 } tx_clone_ctx __packed;
129 #ifdef CONFIG_TIPC_CRYPTO
132 #define SKB_PROBING 1
133 #define SKB_GRACING 2
135 u8 tx_clone_deferred:1;
141 #ifdef CONFIG_TIPC_CRYPTO
146 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
152 /* struct tipc_gap_ack - TIPC Gap ACK block
153 * @ack: seqno of the last consecutive packet in link deferdq
154 * @gap: number of gap packets since the last ack
157 * link deferdq: 1 2 3 4 10 11 13 14 15 20
158 * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
160 struct tipc_gap_ack {
165 /* struct tipc_gap_ack_blks
166 * @len: actual length of the record
167 * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast
169 * @start_index: starting index for "valid" broadcast Gap ACK blocks
170 * @bgack_cnt: number of Gap ACK blocks for broadcast in the record
171 * @gacks: array of Gap ACK blocks
174 * +-------------+-------------+-------------+-------------+
175 * | bgack_cnt | ugack_cnt | len |
176 * +-------------+-------------+-------------+-------------+ -
178 * +-------------+-------------+-------------+-------------+ > bc gacks
180 * +-------------+-------------+-------------+-------------+ -
182 * +-------------+-------------+-------------+-------------+ > uc gacks
184 * +-------------+-------------+-------------+-------------+ -
186 struct tipc_gap_ack_blks {
193 struct tipc_gap_ack gacks[];
196 #define MAX_GAP_ACK_BLKS 128
197 #define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \
198 sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS)
200 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
202 return (struct tipc_msg *)skb->data;
205 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
207 return ntohl(m->hdr[pos]);
210 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
212 m->hdr[w] = htonl(val);
215 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
217 return (msg_word(m, w) >> pos) & mask;
220 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
221 u32 pos, u32 mask, u32 val)
223 val = (val & mask) << pos;
225 m->hdr[w] &= ~htonl(mask);
226 m->hdr[w] |= htonl(val);
229 static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
231 u32 temp = msg->hdr[a];
233 msg->hdr[a] = msg->hdr[b];
240 static inline u32 msg_version(struct tipc_msg *m)
242 return msg_bits(m, 0, 29, 7);
245 static inline void msg_set_version(struct tipc_msg *m)
247 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
250 static inline u32 msg_user(struct tipc_msg *m)
252 return msg_bits(m, 0, 25, 0xf);
255 static inline u32 msg_isdata(struct tipc_msg *m)
257 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
260 static inline void msg_set_user(struct tipc_msg *m, u32 n)
262 msg_set_bits(m, 0, 25, 0xf, n);
265 static inline u32 msg_hdr_sz(struct tipc_msg *m)
267 return msg_bits(m, 0, 21, 0xf) << 2;
270 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
272 msg_set_bits(m, 0, 21, 0xf, n>>2);
275 static inline u32 msg_size(struct tipc_msg *m)
277 return msg_bits(m, 0, 0, 0x1ffff);
280 static inline u32 msg_blocks(struct tipc_msg *m)
282 return (msg_size(m) / 1024) + 1;
285 static inline u32 msg_data_sz(struct tipc_msg *m)
287 return msg_size(m) - msg_hdr_sz(m);
290 static inline int msg_non_seq(struct tipc_msg *m)
292 return msg_bits(m, 0, 20, 1);
295 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
297 msg_set_bits(m, 0, 20, 1, n);
300 static inline int msg_is_syn(struct tipc_msg *m)
302 return msg_bits(m, 0, 17, 1);
305 static inline void msg_set_syn(struct tipc_msg *m, u32 d)
307 msg_set_bits(m, 0, 17, 1, d);
310 static inline int msg_dest_droppable(struct tipc_msg *m)
312 return msg_bits(m, 0, 19, 1);
315 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
317 msg_set_bits(m, 0, 19, 1, d);
320 static inline int msg_is_keepalive(struct tipc_msg *m)
322 return msg_bits(m, 0, 19, 1);
325 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
327 msg_set_bits(m, 0, 19, 1, d);
330 static inline int msg_src_droppable(struct tipc_msg *m)
332 return msg_bits(m, 0, 18, 1);
335 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
337 msg_set_bits(m, 0, 18, 1, d);
340 static inline int msg_ack_required(struct tipc_msg *m)
342 return msg_bits(m, 0, 18, 1);
345 static inline void msg_set_ack_required(struct tipc_msg *m)
347 msg_set_bits(m, 0, 18, 1, 1);
350 static inline int msg_nagle_ack(struct tipc_msg *m)
352 return msg_bits(m, 0, 18, 1);
355 static inline void msg_set_nagle_ack(struct tipc_msg *m)
357 msg_set_bits(m, 0, 18, 1, 1);
360 static inline bool msg_is_rcast(struct tipc_msg *m)
362 return msg_bits(m, 0, 18, 0x1);
365 static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
367 msg_set_bits(m, 0, 18, 0x1, d);
370 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
372 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
375 static inline unchar *msg_data(struct tipc_msg *m)
377 return ((unchar *)m) + msg_hdr_sz(m);
380 static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
382 return (struct tipc_msg *)msg_data(m);
388 static inline u32 msg_type(struct tipc_msg *m)
390 return msg_bits(m, 1, 29, 0x7);
393 static inline void msg_set_type(struct tipc_msg *m, u32 n)
395 msg_set_bits(m, 1, 29, 0x7, n);
398 static inline int msg_in_group(struct tipc_msg *m)
400 int mtyp = msg_type(m);
402 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
405 static inline bool msg_is_grp_evt(struct tipc_msg *m)
407 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
410 static inline u32 msg_named(struct tipc_msg *m)
412 return msg_type(m) == TIPC_NAMED_MSG;
415 static inline u32 msg_mcast(struct tipc_msg *m)
417 int mtyp = msg_type(m);
419 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
420 (mtyp == TIPC_GRP_MCAST_MSG));
423 static inline u32 msg_connected(struct tipc_msg *m)
425 return msg_type(m) == TIPC_CONN_MSG;
428 static inline u32 msg_direct(struct tipc_msg *m)
430 return msg_type(m) == TIPC_DIRECT_MSG;
433 static inline u32 msg_errcode(struct tipc_msg *m)
435 return msg_bits(m, 1, 25, 0xf);
438 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
440 msg_set_bits(m, 1, 25, 0xf, err);
443 static inline void msg_set_bulk(struct tipc_msg *m)
445 msg_set_bits(m, 1, 28, 0x1, 1);
448 static inline u32 msg_is_bulk(struct tipc_msg *m)
450 return msg_bits(m, 1, 28, 0x1);
453 static inline void msg_set_last_bulk(struct tipc_msg *m)
455 msg_set_bits(m, 1, 27, 0x1, 1);
458 static inline u32 msg_is_last_bulk(struct tipc_msg *m)
460 return msg_bits(m, 1, 27, 0x1);
463 static inline void msg_set_non_legacy(struct tipc_msg *m)
465 msg_set_bits(m, 1, 26, 0x1, 1);
468 static inline u32 msg_is_legacy(struct tipc_msg *m)
470 return !msg_bits(m, 1, 26, 0x1);
473 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
475 return msg_bits(m, 1, 21, 0xf);
478 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
480 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
483 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
485 msg_set_bits(m, 1, 21, 0xf, 0);
488 static inline u32 msg_lookup_scope(struct tipc_msg *m)
490 return msg_bits(m, 1, 19, 0x3);
493 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
495 msg_set_bits(m, 1, 19, 0x3, n);
498 static inline u16 msg_bcast_ack(struct tipc_msg *m)
500 return msg_bits(m, 1, 0, 0xffff);
503 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
505 msg_set_bits(m, 1, 0, 0xffff, n);
508 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
509 * link peer session number
511 static inline bool msg_dest_session_valid(struct tipc_msg *m)
513 return msg_bits(m, 1, 16, 0x1);
516 static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
518 msg_set_bits(m, 1, 16, 0x1, valid);
521 static inline u16 msg_dest_session(struct tipc_msg *m)
523 return msg_bits(m, 1, 0, 0xffff);
526 static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
528 msg_set_bits(m, 1, 0, 0xffff, n);
534 static inline u16 msg_ack(struct tipc_msg *m)
536 return msg_bits(m, 2, 16, 0xffff);
539 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
541 msg_set_bits(m, 2, 16, 0xffff, n);
544 static inline u16 msg_seqno(struct tipc_msg *m)
546 return msg_bits(m, 2, 0, 0xffff);
549 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
551 msg_set_bits(m, 2, 0, 0xffff, n);
557 static inline u32 msg_importance(struct tipc_msg *m)
559 int usr = msg_user(m);
561 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
563 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
564 return msg_bits(m, 9, 0, 0x7);
565 return TIPC_SYSTEM_IMPORTANCE;
568 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
570 int usr = msg_user(m);
572 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
573 msg_set_bits(m, 9, 0, 0x7, i);
574 else if (i < TIPC_SYSTEM_IMPORTANCE)
577 pr_warn("Trying to set illegal importance in message\n");
580 static inline u32 msg_prevnode(struct tipc_msg *m)
582 return msg_word(m, 3);
585 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
587 msg_set_word(m, 3, a);
590 static inline u32 msg_origport(struct tipc_msg *m)
592 if (msg_user(m) == MSG_FRAGMENTER)
593 m = msg_inner_hdr(m);
594 return msg_word(m, 4);
597 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
599 msg_set_word(m, 4, p);
602 static inline u16 msg_named_seqno(struct tipc_msg *m)
604 return msg_bits(m, 4, 0, 0xffff);
607 static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n)
609 msg_set_bits(m, 4, 0, 0xffff, n);
612 static inline u32 msg_destport(struct tipc_msg *m)
614 return msg_word(m, 5);
617 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
619 msg_set_word(m, 5, p);
622 static inline u32 msg_mc_netid(struct tipc_msg *m)
624 return msg_word(m, 5);
627 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
629 msg_set_word(m, 5, p);
632 static inline int msg_short(struct tipc_msg *m)
634 return msg_hdr_sz(m) == SHORT_H_SIZE;
637 static inline u32 msg_orignode(struct tipc_msg *m)
639 if (likely(msg_short(m)))
640 return msg_prevnode(m);
641 return msg_word(m, 6);
644 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
646 msg_set_word(m, 6, a);
649 static inline u32 msg_destnode(struct tipc_msg *m)
651 return msg_word(m, 7);
654 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
656 msg_set_word(m, 7, a);
659 static inline u32 msg_nametype(struct tipc_msg *m)
661 return msg_word(m, 8);
664 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
666 msg_set_word(m, 8, n);
669 static inline u32 msg_nameinst(struct tipc_msg *m)
671 return msg_word(m, 9);
674 static inline u32 msg_namelower(struct tipc_msg *m)
676 return msg_nameinst(m);
679 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
681 msg_set_word(m, 9, n);
684 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
686 msg_set_namelower(m, n);
689 static inline u32 msg_nameupper(struct tipc_msg *m)
691 return msg_word(m, 10);
694 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
696 msg_set_word(m, 10, n);
700 * Constants and routines used to read and write TIPC internal message headers
704 * Connection management protocol message types
707 #define CONN_PROBE_REPLY 1
711 * Name distributor message types
713 #define PUBLICATION 0
717 * Segmentation message types
719 #define FIRST_FRAGMENT 0
721 #define LAST_FRAGMENT 2
724 * Link management protocol message types
728 #define ACTIVATE_MSG 2
731 * Changeover tunnel message types
734 #define FAILOVER_MSG 1
737 * Config protocol message types
739 #define DSC_REQ_MSG 0
740 #define DSC_RESP_MSG 1
741 #define DSC_TRIAL_MSG 2
742 #define DSC_TRIAL_FAIL_MSG 3
745 * Group protocol message types
747 #define GRP_JOIN_MSG 0
748 #define GRP_LEAVE_MSG 1
749 #define GRP_ADV_MSG 2
750 #define GRP_ACK_MSG 3
751 #define GRP_RECLAIM_MSG 4
752 #define GRP_REMIT_MSG 5
754 /* Crypto message types */
755 #define KEY_DISTR_MSG 0
760 static inline u32 msg_seq_gap(struct tipc_msg *m)
762 return msg_bits(m, 1, 16, 0x1fff);
765 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
767 msg_set_bits(m, 1, 16, 0x1fff, n);
770 static inline u32 msg_node_sig(struct tipc_msg *m)
772 return msg_bits(m, 1, 0, 0xffff);
775 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
777 msg_set_bits(m, 1, 0, 0xffff, n);
780 static inline u32 msg_node_capabilities(struct tipc_msg *m)
782 return msg_bits(m, 1, 15, 0x1fff);
785 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
787 msg_set_bits(m, 1, 15, 0x1fff, n);
793 static inline u32 msg_dest_domain(struct tipc_msg *m)
795 return msg_word(m, 2);
798 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
800 msg_set_word(m, 2, n);
803 static inline u32 msg_bcgap_after(struct tipc_msg *m)
805 return msg_bits(m, 2, 16, 0xffff);
808 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
810 msg_set_bits(m, 2, 16, 0xffff, n);
813 static inline u32 msg_bcgap_to(struct tipc_msg *m)
815 return msg_bits(m, 2, 0, 0xffff);
818 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
820 msg_set_bits(m, 2, 0, 0xffff, n);
826 static inline u32 msg_last_bcast(struct tipc_msg *m)
828 return msg_bits(m, 4, 16, 0xffff);
831 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
833 return msg_last_bcast(m) + 1;
836 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
838 msg_set_bits(m, 4, 16, 0xffff, n);
841 static inline u32 msg_nof_fragms(struct tipc_msg *m)
843 return msg_bits(m, 4, 0, 0xffff);
846 static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
848 msg_set_bits(m, 4, 0, 0xffff, n);
851 static inline u32 msg_fragm_no(struct tipc_msg *m)
853 return msg_bits(m, 4, 16, 0xffff);
856 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
858 msg_set_bits(m, 4, 16, 0xffff, n);
861 static inline u16 msg_next_sent(struct tipc_msg *m)
863 return msg_bits(m, 4, 0, 0xffff);
866 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
868 msg_set_bits(m, 4, 0, 0xffff, n);
871 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
873 msg_set_bits(m, 4, 0, 0xffff, n);
876 static inline u32 msg_bc_netid(struct tipc_msg *m)
878 return msg_word(m, 4);
881 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
883 msg_set_word(m, 4, id);
886 static inline u32 msg_link_selector(struct tipc_msg *m)
888 if (msg_user(m) == MSG_FRAGMENTER)
889 m = (void *)msg_data(m);
890 return msg_bits(m, 4, 0, 1);
896 static inline u16 msg_session(struct tipc_msg *m)
898 return msg_bits(m, 5, 16, 0xffff);
901 static inline void msg_set_session(struct tipc_msg *m, u16 n)
903 msg_set_bits(m, 5, 16, 0xffff, n);
906 static inline u32 msg_probe(struct tipc_msg *m)
908 return msg_bits(m, 5, 0, 1);
911 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
913 msg_set_bits(m, 5, 0, 1, val);
916 static inline char msg_net_plane(struct tipc_msg *m)
918 return msg_bits(m, 5, 1, 7) + 'A';
921 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
923 msg_set_bits(m, 5, 1, 7, (n - 'A'));
926 static inline u32 msg_linkprio(struct tipc_msg *m)
928 return msg_bits(m, 5, 4, 0x1f);
931 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
933 msg_set_bits(m, 5, 4, 0x1f, n);
936 static inline u32 msg_bearer_id(struct tipc_msg *m)
938 return msg_bits(m, 5, 9, 0x7);
941 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
943 msg_set_bits(m, 5, 9, 0x7, n);
946 static inline u32 msg_redundant_link(struct tipc_msg *m)
948 return msg_bits(m, 5, 12, 0x1);
951 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
953 msg_set_bits(m, 5, 12, 0x1, r);
956 static inline u32 msg_peer_stopping(struct tipc_msg *m)
958 return msg_bits(m, 5, 13, 0x1);
961 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
963 msg_set_bits(m, 5, 13, 0x1, s);
966 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
968 switch (msg_user(m)) {
970 case NAME_DISTRIBUTOR:
972 return msg_bits(m, 5, 14, 0x1);
978 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
980 msg_set_bits(m, 5, 14, 0x1, invalid);
983 static inline char *msg_media_addr(struct tipc_msg *m)
985 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
988 static inline u32 msg_bc_gap(struct tipc_msg *m)
990 return msg_bits(m, 8, 0, 0x3ff);
993 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
995 msg_set_bits(m, 8, 0, 0x3ff, n);
1001 static inline u16 msg_msgcnt(struct tipc_msg *m)
1003 return msg_bits(m, 9, 16, 0xffff);
1006 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
1008 msg_set_bits(m, 9, 16, 0xffff, n);
1011 static inline u16 msg_syncpt(struct tipc_msg *m)
1013 return msg_bits(m, 9, 16, 0xffff);
1016 static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
1018 msg_set_bits(m, 9, 16, 0xffff, n);
1021 static inline u32 msg_conn_ack(struct tipc_msg *m)
1023 return msg_bits(m, 9, 16, 0xffff);
1026 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
1028 msg_set_bits(m, 9, 16, 0xffff, n);
1031 static inline u16 msg_adv_win(struct tipc_msg *m)
1033 return msg_bits(m, 9, 0, 0xffff);
1036 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
1038 msg_set_bits(m, 9, 0, 0xffff, n);
1041 static inline u32 msg_max_pkt(struct tipc_msg *m)
1043 return msg_bits(m, 9, 16, 0xffff) * 4;
1046 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
1048 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
1051 static inline u32 msg_link_tolerance(struct tipc_msg *m)
1053 return msg_bits(m, 9, 0, 0xffff);
1056 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
1058 msg_set_bits(m, 9, 0, 0xffff, n);
1061 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
1063 return msg_bits(m, 9, 16, 0xffff);
1066 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
1068 msg_set_bits(m, 9, 16, 0xffff, n);
1071 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
1073 return msg_bits(m, 9, 16, 0xffff);
1076 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
1078 msg_set_bits(m, 9, 16, 0xffff, n);
1081 static inline u16 msg_grp_remitted(struct tipc_msg *m)
1083 return msg_bits(m, 9, 16, 0xffff);
1086 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
1088 msg_set_bits(m, 9, 16, 0xffff, n);
1093 static inline u16 msg_grp_evt(struct tipc_msg *m)
1095 return msg_bits(m, 10, 0, 0x3);
1098 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
1100 msg_set_bits(m, 10, 0, 0x3, n);
1103 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
1105 return msg_bits(m, 10, 0, 0x1);
1108 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
1110 msg_set_bits(m, 10, 0, 0x1, n);
1113 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
1115 return msg_bits(m, 10, 16, 0xffff);
1118 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
1120 msg_set_bits(m, 10, 16, 0xffff, n);
1123 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
1125 if (likely(msg_user(m) != LINK_PROTOCOL))
1127 if (msg_type(m) == STATE_MSG)
1132 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
1134 if (msg_peer_link_is_up(m))
1136 return msg_redundant_link(m);
1139 static inline bool msg_is_reset(struct tipc_msg *hdr)
1141 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
1146 static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
1148 msg_set_word(m, 13, n);
1151 static inline u32 msg_peer_net_hash(struct tipc_msg *m)
1153 return msg_word(m, 13);
1158 static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
1160 return msg_word(m, 14);
1163 static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
1165 msg_set_word(m, 14, n);
1168 static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
1170 memcpy(msg_data(hdr), id, 16);
1173 static inline u8 *msg_node_id(struct tipc_msg *hdr)
1175 return (u8 *)msg_data(hdr);
1178 struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
1179 bool tipc_msg_validate(struct sk_buff **_skb);
1180 bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
1181 void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
1182 struct sk_buff_head *xmitq);
1183 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
1184 u32 hsize, u32 destnode);
1185 struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
1186 uint data_sz, u32 dnode, u32 onode,
1187 u32 dport, u32 oport, int errcode);
1188 int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
1189 bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss,
1190 u32 dnode, bool *new_bundle);
1191 bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
1192 int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr,
1193 int pktmax, struct sk_buff_head *frags);
1194 int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
1195 int offset, int dsz, int mtu, struct sk_buff_head *list);
1196 int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen,
1197 int mss, struct sk_buff_head *txq);
1198 bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
1199 bool tipc_msg_assemble(struct sk_buff_head *list);
1200 bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
1201 bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
1202 struct sk_buff_head *cpy);
1203 bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
1204 struct sk_buff *skb);
1205 bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
1207 static inline u16 buf_seqno(struct sk_buff *skb)
1209 return msg_seqno(buf_msg(skb));
1212 static inline int buf_roundup_len(struct sk_buff *skb)
1214 return (skb->len / 1024 + 1) * 1024;
1217 /* tipc_skb_peek(): peek and reserve first buffer in list
1218 * @list: list to be peeked in
1219 * Returns pointer to first buffer in list, if any
1221 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1224 struct sk_buff *skb;
1227 skb = skb_peek(list);
1230 spin_unlock_bh(lock);
1234 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1235 * up to and including 'filter'.
1236 * Note: ignoring previously tried destinations minimizes the risk of
1237 * contention on the socket lock
1238 * @list: list to be peeked in
1239 * @filter: last destination to be ignored from search
1240 * Returns a destination port number, of applicable.
1242 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1244 struct sk_buff *skb;
1248 spin_lock_bh(&list->lock);
1249 skb_queue_walk(list, skb) {
1250 dport = msg_destport(buf_msg(skb));
1251 if (!filter || skb_queue_is_last(list, skb))
1253 if (dport == filter)
1258 spin_unlock_bh(&list->lock);
1262 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1263 * @list: list to be unlinked from
1264 * @dport: selection criteria for buffer to unlink
1266 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1269 struct sk_buff *_skb, *tmp, *skb = NULL;
1271 spin_lock_bh(&list->lock);
1272 skb_queue_walk_safe(list, _skb, tmp) {
1273 if (msg_destport(buf_msg(_skb)) == dport) {
1274 __skb_unlink(_skb, list);
1279 spin_unlock_bh(&list->lock);
1283 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1284 * @list: the new list to append. Not lock protected
1285 * @head: target list. Lock protected.
1287 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1288 struct sk_buff_head *head)
1290 spin_lock_bh(&head->lock);
1291 skb_queue_splice_tail(list, head);
1292 spin_unlock_bh(&head->lock);
1295 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1296 * @list: the new list to add. Lock protected. Will be reinitialized
1297 * @head: target list. Lock protected.
1299 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1300 struct sk_buff_head *head)
1302 struct sk_buff_head tmp;
1304 __skb_queue_head_init(&tmp);
1306 spin_lock_bh(&list->lock);
1307 skb_queue_splice_tail_init(list, &tmp);
1308 spin_unlock_bh(&list->lock);
1309 tipc_skb_queue_splice_tail(&tmp, head);
1312 /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
1313 * @list: list to be dequeued from
1314 * @seqno: seqno of the expected msg
1316 * returns skb dequeued from the list if its seqno is less than or equal to
1317 * the expected one, otherwise the skb is still hold
1319 * Note: must be used with appropriate locks held only
1321 static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
1324 struct sk_buff *skb = skb_peek(list);
1326 if (skb && less_eq(buf_seqno(skb), seqno)) {
1327 __skb_unlink(skb, list);